Heat-conducting tube



Patented Aug. 28, 1928.

UNITED STATES PATENT OFFICE.

JOSEPH B. MUBBAYvAND THOMAS E. MURRAY, JR., OF BROOKLYN, NEW YORK.

, HEAT-CONDUCTING TUBE.

Application med :une 17, 1924. semi No. 720,512.

In cert-ain prior applications, Nos. 642,427l

- which is in Contact with the water or other fluid in the tube.

The present invention provides a unit and a method of producing the samefrom which such boiler walls andthe like may be built. The accompanyingdrawings illustrate embodiments of the invention.

` Fig. 1 is a horizontal section of a side wall of a. boiler built withthe tubular units of the invention;

Fig. 2 is an enlarged perspective view of one of the tubes.

In another application pending concurrently herewith Serial No. 715,369,filed May 28, 1924, there is .described a unit for the purpose statedwith flanges of certain shapes and methods of'production andapplication. The present application is directed to a specifi'- callydifferent unit.

The boiler wall has on the inside a @reen composed of tubes 1 withlateral fins or flanges 2 overlapping each other. Outside of this screenis the usual wall made of refractory brick 3, tiles 4 of non-conductingmaterial and an outer shell 5 of sheet metal. As illustrated in Fig. 2the flanges 2 are composed of a plate or flat bar extending continuouslythrough the tube, so that the opsite flanges are integral with eachother. he tube is made of semi-circular segments with their edge-sbrought to register at opposite sidespof the flat-plate and butt Weldedat the points of contact 6.' The cent-ral portion 7 of the plateconducts the heat from the flanges 2 directly into the water or otherfluid 1n the tube and thus provides a very efficient structure. Theinner part 7 of the plate 1s provided with slots 8 at intervals so as toprevent circulation of the water on opposite sides of the-plate.

'As stated in application No. 715,369, above 50 referred to, the tubesmay be of vario-us shapes and may be of ordinary low carbon steel, whilethe flanges may be made of spep lal alloys o-r specially coated toresist oxida- While we have described with great particularity of detailcertain embodiments of our invention, yet it is not to be understoodtherefrom that the invention is restricted to the particular embodimentsdisclosed. Various modifications may be made by those skilled in the artwitho-ut departure from the invention as defined in the followingcla-im.

What we claim is:

A heat conducting unit comprising a tubular member made up of a plateand of hollow segments welded to opposite side-s of said plate vtoprovide a tube with lateral flanges extending beyond the tube and eX-posed to the surrounding medium, the part of the plate within the tubebeing apertured to permit circulation between opposite sides thereof. t

In witness whereof, we .have hereunto signed our names.

JOSEPH B. MURRAY.- THOMASl E. MURRAY, JR.

